Elevator leveling sensor based on Hall effect
By adopting Hall effect principle and signal processing unit in elevator level sensors, the sensor is susceptible to contamination and long response time is solved, and higher pollution resistance and faster response time are achieved.
Patent Information
- Application Number
- CN202421653091.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-12
AI Technical Summary
Existing elevator level sensors are susceptible to contamination in elevator shaft environments, resulting in sensor failure, and the magnetic-inductive sensor with reed tube structure has a long response time.
Using an elevator flat layer sensor based on the Hall effect, the flat layer position information is detected using the Hall circuit board and permanent magnet. The sensor has a slot-type structure, which is easy to replace, and the response time is shortened by the signal processing unit.
It improves the anti-fouling capability of the sensor, shortens the response time, and makes it more stable and fast in elevator shaft environments.
Smart Images
Figure CN222947890U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of elevator leveling sensors, in particular to an elevator leveling sensor based on the Hall effect. Background Art
[0002] At present, most sensors used for elevator leveling detection are photoelectric sensors and magnetic sensors. Although photoelectric sensors have high accuracy, their anti-fouling ability is weak. When used in the elevator shaft environment, dust or dirt accumulates on the light emitter and the receiver, which can easily lead to sensor failure. In order to improve the anti-fouling ability of photoelectric sensors, it is necessary to select components with better photosensitivity, which increases the cost of photoelectric sensors. Magnetic sensors mostly use reed switches as detection components, which are triggered by permanent magnets. Even if the surface is contaminated, it will not affect the detection, and they have strong anti-fouling ability. However, the reed switch is a mechanical structure, and the output of the leveling signal is realized by the contact points in the reed switch being attracted and disconnected, which results in a longer response time of the sensor (the time it takes for the contact points to be attracted), which is slower than the response speed of the photoelectric sensor. Utility Model Content
[0003] The purpose of the utility model is to provide an elevator leveling sensor based on the Hall effect to solve the above technical problems;
[0004] An elevator leveling sensor based on Hall effect, comprising:
[0005] The shell has a slot, and the slot is used to insert a leveling trigger device installed in the elevator shaft when the elevator is running. The shell has a slot inside.
[0006] A permanent magnet is located at one side of the slot;
[0007] A Hall circuit board is located at the other side of the slot opposite to the permanent magnet;
[0008] The signal interface part is connected to the Hall circuit board.
[0009] Preferably, the Hall circuit board is provided with:
[0010] A voltage regulator, used to process the input voltage of the Hall circuit board;
[0011] An adjustable resistor connected to the voltage regulator to adjust the comparison voltage;
[0012] A Hall sensor connected to the voltage regulator to output a voltage to be compared;
[0013] The signal processing unit is connected to the adjustable resistor and the Hall sensor.
[0014] Preferably, the signal processing unit includes:
[0015] A follower, wherein the positive input terminal of the follower is connected to the adjustable resistor, and the negative input terminal of the follower is connected to the output terminal of the follower;
[0016] A comparator, wherein the positive input terminal of the comparator is connected to the output terminal of the follower, and the negative input terminal of the comparator is connected to the Hall sensor;
[0017] The open collector output circuit is connected to the output end of the comparator to output a leveling signal.
[0018] Preferably, the signal interface unit includes an input voltage interface, a zero volt voltage interface and an output voltage interface;
[0019] The input voltage interface is connected to the voltage regulator, and the output voltage interface is connected to the open collector output circuit.
[0020] Preferably, the Hall sensor is a linear Hall sensor, and a response time of the Hall sensor is less than 30 microseconds.
[0021] Preferably, the elevator leveling sensor is a magnetic inductive sensor.
[0022] Preferably, the leveling trigger device is a magnetic isolation plate, which is a magnetic conductive material plate and changes the magnetic field line when inserted into the slot.
[0023] Preferably, the elevator leveling sensor is arranged on the elevator car.
[0024] Preferably, when the leveling trigger device is located at the notch, the magnetic field strength on one side of the Hall circuit board is smaller than the magnetic field strength on one side of the permanent magnet.
[0025] Preferably, when the open collector output circuit outputs the leveling signal, the voltage value of the voltage to be compared is less than or equal to the comparison voltage.
[0026] The beneficial effects of the utility model are: the leveling position information is detected by using the Hall effect principle, the outer structure of the sensor is a groove structure, which is the same as the outer structure of the photoelectric sensor and is easy to replace. Compared with the magnetic induction sensor of the reed switch structure, the response time is shortened. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is the detection principle diagram of the utility model based on the Hall effect;
[0028] Figure 2 is Figure 1 The magnetic field variation diagram with the magnetic isolation plate inserted in the middle;
[0029] Figure 3It is a schematic diagram of the elevator leveling sensor of the utility model;
[0030] Figure 4 yes Figure 3 Schematic diagram of the internal structure;
[0031] Figure 5 It is a schematic diagram of the position of the adjustable resistor;
[0032] Figure 6 This is a schematic diagram of the power supply of the Hall circuit board of the utility model;
[0033] Figure 7 It is a circuit connection diagram of the Hall circuit board of the utility model.
[0034] In the attached figure: 1. outer shell; 11. notch; 2. magnetic isolation plate; 3. permanent magnet; 4. Hall circuit board; 5. signal interface unit; 6. voltage regulator; 7. adjustable resistor; 8. Hall sensor; 9. signal processing unit; 91. follower; 92. comparator; 93. open collector output circuit. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.
[0038] An elevator leveling sensor based on the Hall effect, such as Figures 1 to 7 As shown, including
[0039] The shell 1 has a slot 11, which is used to insert a leveling trigger device installed in the elevator shaft when the elevator is running. The shell 1 has a slot 11,
[0040] The permanent magnet 3 is located on one side of the slot 11;
[0041] The Hall circuit board 4 is located at the other side of the slot 11 opposite to the permanent magnet 3;
[0042] The signal interface part 5 is connected to the Hall circuit board 4 .
[0043] Specifically, the utility model provides an elevator leveling sensor based on the Hall effect. The elevator leveling sensor has a slot-type structure, which makes it have the same appearance structure as a photoelectric sensor and is easy to replace. The leveling position information is detected and output using the Hall effect principle, which shortens the response time compared to the magnetic induction sensor with a reed switch structure.
[0044] In a preferred embodiment, the Hall circuit board 4 is provided with:
[0045] A voltage regulator 6, used to process the input voltage Vcc of the Hall circuit board 4;
[0046] The adjustable resistor 7 is connected to the voltage regulator 6 to adjust the comparison voltage Vcmp to achieve the purpose of adjusting the sensitivity of the sensor;
[0047] The Hall sensor 8 is connected to the voltage regulator 6 to output a voltage to be compared Vout and detect the change of the magnetic field;
[0048] A signal processing unit 9, connected to the adjustable resistor 7 and the Hall sensor 8;
[0049] The signal processing unit 9 includes:
[0050] A follower 91, wherein the positive input terminal of the follower 91 is connected to the adjustable resistor 7, and the negative input terminal of the follower 91 is connected to the output terminal of the follower 91;
[0051] A comparator 92, wherein a positive input terminal of the comparator 92 is connected to the output terminal of the follower 91, and a negative input terminal of the comparator 92 is connected to the Hall sensor 8;
[0052] The open collector output circuit 93 is connected to the output end of the comparator 92 and is used to output a leveling signal DZ.
[0053] Specifically, according to Figure 1 The Hall sensor 8 is placed in the position shown in the figure. At this time, the Hall sensor 8 is in a strong magnetic field environment. The magnetic flux lines generated by the permanent magnet 3 pass through the Hall sensor 8. The output voltage Vout of the Hall sensor 8 is the maximum value, Vout = Vmax. During the insertion of the trigger device along the direction of arrow A, more and more magnetic flux lines will be absorbed, so that the magnetic flux lines passing through the Hall sensor 8 will gradually decrease, that is, the magnetic field strength of the Hall sensor 8 will gradually decrease. The output voltage Vout of the Hall sensor 8 will also gradually decrease. When the trigger device reaches Figure 2 When the position is shown (completely blocked between the permanent magnet 3 and the Hall sensor 8), the Hall sensor 8 is in a weak magnetic field environment, and the output voltage Vout of the Hall sensor 8 is the minimum value, Vout=Vmin.
[0054] More specifically, after the input voltage Vcc is processed by the voltage regulator 6, a DC 5V voltage is output. The DC 5V voltage will power the following four functional circuits: the adjustable resistor 7, the Hall sensor 8, the comparator 92, and the follower 91. After the DC 5V voltage passes through the adjustable resistor 7, it becomes a comparison voltage Vcmp (Vmax<Vcmp<Vmin). Then Vcmp is connected to the positive input terminal of the comparator 92 through the follower 91. The follower 91 plays an isolation role here to improve the anti-interference ability of the printed board, which is the Hall circuit board 4.
[0055] More specifically, the DC 5V voltage is used to power the Hall sensor 8, and the output voltage Vout of the Hall sensor 8 is connected to the negative input terminal of the comparator 92. When Vout>Vcmp, the comparator 92 does not output a voltage, and the sensor has no leveling signal DZ output. When Vout≤Vcmp, the comparator 92 outputs a voltage, and outputs a DZ signal through the open collector output circuit 93 (here it can be designed as DZ=Vcc=DC 60V). The utility model includes but is not limited to the output of one signal. Although a single output signal DZ is used as an example in this embodiment, the present solution can also realize the output of multiple signals. If multiple signal outputs are to be realized, the corresponding printed board and permanent magnet 3 need to be added, and their design scheme is the same as that of the present embodiment.
[0056] In a preferred embodiment, the signal interface unit 5 includes an input voltage interface, a zero volt voltage interface and an output voltage interface;
[0057] The input voltage interface is connected to the voltage regulator 6 , and the output voltage interface is connected to the open collector output circuit 93 .
[0058] Specifically, the input voltage Vcc of the input voltage interface is not limited, and the design of the input circuit can be adjusted according to the different input voltage Vcc, but the detection principle based on the Hall effect and the circuit design remain unchanged.
[0059] In a preferred embodiment, the Hall sensor 8 is a linear Hall sensor, and the response time of the Hall sensor 8 is less than 30 microseconds.
[0060] Specifically, the linear Hall sensor used in the utility model is easy to purchase, and the response time is within 30 microseconds, which is comparable to the response time of most infrared transceiver sensors. Therefore, the response time of the sensor of the utility model can be comparable to that of the photoelectric sensor, and the response time is shortened compared to the sensor of the reed switch structure.
[0061] In a preferred embodiment, the elevator leveling sensor is a magnetic inductive sensor with strong anti-pollution ability.
[0062] In a preferred embodiment, the leveling trigger device is a magnetic isolation plate 2 , which is a magnetic conductive material plate and changes the magnetic field line when inserted into the slot 11 .
[0063] Specifically, the magnetic isolation plate 2 is made of magnetic conductive material, such as iron plate, etc. The function of the magnetic isolation plate 2 is to absorb the magnetic flux lines generated by the permanent magnet 3, change the magnetic field line, and form a weaker magnetic field on its rear side.
[0064] In a preferred embodiment, the elevator leveling sensor is arranged on the elevator car.
[0065] Specifically, the slot-type sensor is installed on the elevator car so that when the elevator moves up and down, the magnetic isolation plate 2 of each floor can extend into the slot 11 of the sensor to cut the magnetic lines of force, so that when the elevator passes the leveling position of any floor, the sensor can output a DZ signal to the elevator control system.
[0066] In a preferred embodiment, when the leveling trigger device is located at the notch 11, the magnetic field strength on one side of the Hall circuit board 4 is smaller than the magnetic field strength on one side of the permanent magnet 3;
[0067] When the open collector output circuit 93 outputs the leveling signal DZ, the voltage value of the voltage to be compared Vout is less than or equal to the comparison voltage Vcmp.
[0068] Specifically, the utility model relates to an elevator leveling sensor and trigger device based on the Hall effect. A magnetic isolation plate 2 is installed in the shaft of each floor as a trigger device, and the height of each magnetic isolation plate 2 is adjusted according to the leveling position of the current floor. The slot sensor is installed on the elevator car, so that when the elevator moves up and down, the magnetic isolation plate 2 of each floor can extend into the slot 11 of the sensor to cut the magnetic flux lines, so that when the elevator passes the leveling position of any floor, the sensor can output a DZ signal to the elevator control system.
[0069] Specifically, during the process from when the magnetic isolation plate 2 is not inserted to when it is fully inserted, the output voltage Vout of the Hall sensor 8 decreases from Vmax to Vmin. A comparison voltage Vcmp is set here (Vmax<Vcmp<Vmin). When Vout>Vcmp, the sensor does not output the leveling signal DZ. When Vout≤Vcmp, the sensor detects that the elevator has reached the leveling position and outputs the leveling signal DZ.
[0070] In the present invention, the Hall effect is to make a current pass through a metal conductor plate and place it in a magnetic field perpendicular to the current, and a voltage will be generated between the two sides parallel to the magnetic field and the current. Figure 1The permanent magnet 3 is placed in the position shown, and includes an N pole and an S pole. At this time, the Hall sensor 8 is in a strong magnetic field environment, and the magnetic flux lines generated by the permanent magnet 3 pass through the Hall sensor 8.
[0071] Specifically, Figure 2 As shown, a magnetic isolation plate 2 is gradually inserted between the Hall sensor 8 and the permanent magnet 3 along the direction of arrow A. The function of the magnetic isolation plate 2 is to absorb the magnetic flux lines generated by the permanent magnet 3, change the magnetic field line, and form a weaker magnetic field on its rear side. During the insertion of the magnetic isolation plate 2 along the direction of arrow A, more and more magnetic flux lines will be absorbed, so that the magnetic flux lines passing through the Hall sensor 8 will gradually decrease, that is, the magnetic field strength where the Hall sensor 8 is located will gradually decrease. The effect of magnetic isolation is proportional to the thickness and surface area of the magnetic isolation plate 2, so the thickness and surface area of the magnetic isolation plate 2 affect the value of Vmin.
[0072] More specifically, in the process from when the magnetic isolation plate 2 as a trigger device is not inserted to when it is fully inserted, the output voltage Vout of the Hall sensor 8 decreases from Vmax to Vmin. A comparison voltage Vcmp (Vmax<Vcmp<Vmin) is set here. When Vout>Vcmp, the sensor does not output the leveling signal DZ. When Vout≤Vcmp, the sensor detects that the elevator has reached the leveling position and outputs the leveling signal DZ. This is the detection principle of the elevator leveling sensor and related triggering device based on the Hall effect.
[0073] In summary, the present application provides an elevator leveling sensor based on the Hall effect, which has strong anti-fouling ability. Compared with the magnetic induction sensor based on the reed switch structure, it has a shorter response time, faster reaction and low cost. It has the same appearance structure as the photoelectric sensor, which is a slot-type structure, has strong interchangeability and is easy to replace.
[0074] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. An elevator leveling sensor based on the Hall effect, characterized in that: include, A shell (1) is provided with a notch (11), wherein the notch (11) is used to insert a leveling trigger device installed in the elevator shaft when the elevator is running, and the shell (1) is provided inside: A permanent magnet (3) is located on one side of the notch (11); A Hall circuit board (4) is located on the other side of the slot (11) opposite to the permanent magnet (3); A signal interface portion (5) is connected to the Hall circuit board (4).
2. The elevator leveling sensor based on the Hall effect according to claim 1, characterized in that: The Hall circuit board (4) is provided with: A voltage stabilizer (6) for processing an input voltage (Vcc) of the Hall circuit board (4); An adjustable resistor (7), connected to the voltage regulator (6), for adjusting a comparison voltage (Vcmp); A Hall sensor (8), connected to the voltage regulator (6), for outputting a voltage to be compared (Vout); A signal processing unit (9) is connected to the adjustable resistor (7) and the Hall sensor (8).
3. The elevator leveling sensor based on the Hall effect according to claim 2 is characterized in that: The signal processing unit (9) comprises: A follower (91), wherein a positive input end of the follower (91) is connected to the adjustable resistor (7), and a negative input end of the follower (91) is connected to an output end of the follower (91); A comparator (92), wherein a positive input terminal of the comparator (92) is connected to the output terminal of the follower (91), and a negative input terminal of the comparator (92) is connected to the Hall sensor (8); The open collector output circuit (93) is connected to the output end of the comparator (92) and is used to output a leveling signal (DZ).
4. The elevator leveling sensor based on the Hall effect according to claim 3 is characterized in that: The signal interface unit (5) comprises an input voltage interface, a zero volt voltage interface and an output voltage interface; The input voltage interface is connected to the voltage regulator (6), and the output voltage interface is connected to the open collector output circuit (93).
5. The elevator leveling sensor based on the Hall effect according to claim 2, characterized in that: The Hall sensor (8) is a linear Hall sensor, and the response time of the Hall sensor (8) is less than 30 microseconds.
6. The elevator leveling sensor based on Hall effect according to claim 1, characterized in that: The elevator leveling sensor is a magnetic inductive sensor.
7. The elevator leveling sensor based on Hall effect according to claim 1, characterized in that: The leveling trigger device is a magnetic isolation plate (2), which is a magnetic conductive material plate and changes the magnetic field line when inserted into the slot (11).
8. The elevator leveling sensor based on Hall effect according to claim 1, characterized in that: The elevator leveling sensor is arranged on the elevator car.
9. The elevator leveling sensor based on Hall effect according to claim 1, characterized in that: When the leveling trigger device is located at the notch (11), the magnetic field strength on one side of the Hall circuit board (4) is smaller than the magnetic field strength on one side of the permanent magnet (3).
10. The elevator leveling sensor based on Hall effect according to claim 3, characterized in that: When the open collector output circuit (93) outputs the leveling signal (DZ), the voltage value of the voltage to be compared (Vout) is less than or equal to the comparison voltage (Vcmp).